hoqper



U N ITED STATES PATENT OFFICE.

BENJ. F. HOOPER, OF ALBANY, NEW YORK, ASSIGNOR TO HIMSELF AND RANSOMBALLOU, JR., OF SAME PLAGE.

PRESS FOR SHEARING .AND PUNCHING.

Specification of Letters Patent No. 17,996, dated August 11, `1857'.

To all whom t may concer/n:

Be it known that I, BENJAMIN F. HooPER, of the city of Albany, State ofNew York, have invented a new and Improved Arrangement and Combinationof Mechanical Powers in a Press for Operating Punches or Shears; and Ideclare the following specication, with the drawings hereto annexed aspart thereof, to be a full and complete description of my invention.

A, A is a heavy base or standard prolonged upward and outward into fourparallel arms B B B B. Secured between these arms at each end, projectdownward two brackets C, C, the one for supporting and directing themovements of the punch P and the other of the shears S. The stems ofthese tools pass up through these brackets and above the top thereofeach is divided into two ears a, a, across which lies a roller or pin atr, 1^.

Lying on the top of the brackets C, C, between B, B, is a strong squarebar D, whose ends project through and beyond the ears, a, a. In each endof this bar a slot .7), b, is made of a size to admit the roller 1'.This slot is of any determinate length and is inclined downward at suchan angle that its inner end at w (see diagram Figure 2) shall be as muchlower than y its outer end from the line of motion y z, of the bar asthe intended movement of the punches or shears is to be, e, being themeasure of that movement.

The beam D is kept in its place by the rollers R R ,placed in theextremev upper corners of the arms B, B, as near to the ears a, c, ofthe punch and shears as may be, in order to relieve the strain upon thebeam, when pressed upward by strain on the tools.

The beam D is moved backward and forward in this way: To its lower sideare attached at right angles to it two cross pieces E, E, parallel witheach other and having a space between them into which the pin G can movefreely as in a slot. The pin G is attached near the periphery of ahorizontal disk or wheel W fixed upon a shaft H passing downward throughthe center of the base. This pin must be so adjusted that its extremediametrical motion shall be equal to the space to be traversed by theroller r in the slot le of beam D, to which shaft the driving power isapplied.

The operation of the machine is simple. The revolution of the disk (orcrank) W by its pin Gr operating upon the cross pieces E E impels thebeam D backward and forward which motion by the operation of the slot 7cupon pin r propels the punch and shears vertically with' a powerproportional to the difference between the circuit of the pin Gr and thedistance e, w.

rIhe advantages of this arrangement of machinery are that it permits thepunch and shears to be placed at convenient working distances by theproportioning of the beam without the use of additional gearing. Itfurther gives the tools a vertical movement so that they can be operatedon the same plane. Also it permits the communication in the simplest wayof the motive power, by means of the vertical shaft and bevel gear underthe floor of the workshop, removing all inconvenient appendages from thescene of operations.

I claim- The employment of the beam D having an inclined slot in itsextremities carrying the pins on which the punch and shears aresuspended, as described, and operated in the manner substantially as setforth in the within specification.

BENJ. F. I-IOOPER.

Vitnesses:

RICHD. VARIGK DE WITT, DAviD M. BARNES.

